ATE20242T1 - PROCESS FOR THE PREPARATION OF STORAGE-STABLE AQUEOUS SOLUTIONS OF MELAMINE-FORMALDEHYDE RESINS. - Google Patents

PROCESS FOR THE PREPARATION OF STORAGE-STABLE AQUEOUS SOLUTIONS OF MELAMINE-FORMALDEHYDE RESINS.

Info

Publication number
ATE20242T1
ATE20242T1 AT81109882T AT81109882T ATE20242T1 AT E20242 T1 ATE20242 T1 AT E20242T1 AT 81109882 T AT81109882 T AT 81109882T AT 81109882 T AT81109882 T AT 81109882T AT E20242 T1 ATE20242 T1 AT E20242T1
Authority
AT
Austria
Prior art keywords
melamine
aqueous solutions
formaldehyde resins
preparation
storage
Prior art date
Application number
AT81109882T
Other languages
German (de)
Inventor
Friedl Heger
Original Assignee
Chemie Linz Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6119928&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=ATE20242(T1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Chemie Linz Ag filed Critical Chemie Linz Ag
Application granted granted Critical
Publication of ATE20242T1 publication Critical patent/ATE20242T1/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G12/00—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
    • C08G12/02—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes
    • C08G12/26—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds
    • C08G12/30—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds with substituted triazines
    • C08G12/32—Melamines
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G12/00—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
    • C08G12/02—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes
    • C08G12/26—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds
    • C08G12/34—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds and acyclic or carbocyclic compounds
    • C08G12/36—Ureas; Thioureas
    • C08G12/38—Ureas; Thioureas and melamines

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Phenolic Resins Or Amino Resins (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Abstract

An improved process for substantially increasing the shelf-life of aqueous solutions of melamine-formaldehyde resins wherein the molar ratio of melamine to formaldehyde is from 1:1.7 to 1:3.5 by the addition of a stabilizing amount of urea after condensation, which process includes the steps of adjusting pH of the resin solution before and after the dissolution of the urea within certain narrow but easily controllable pH ranges. The properties of the resin solution can be further improved and the stabilizing effect of the addition of urea increased by adding a monohydric C1-C4 alkanol during condensation of the resin.
AT81109882T 1980-12-22 1981-11-25 PROCESS FOR THE PREPARATION OF STORAGE-STABLE AQUEOUS SOLUTIONS OF MELAMINE-FORMALDEHYDE RESINS. ATE20242T1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803048448 DE3048448A1 (en) 1980-12-22 1980-12-22 METHOD FOR THE PRODUCTION OF STORAGE-STABLE AQUEOUS SOLUTIONS OF MELAMINE FORMALDEHYDE RESIN
EP81109882A EP0054755B1 (en) 1980-12-22 1981-11-25 Method of preparing storage-stable aqueous melamine resin solutions

Publications (1)

Publication Number Publication Date
ATE20242T1 true ATE20242T1 (en) 1986-06-15

Family

ID=6119928

Family Applications (1)

Application Number Title Priority Date Filing Date
AT81109882T ATE20242T1 (en) 1980-12-22 1981-11-25 PROCESS FOR THE PREPARATION OF STORAGE-STABLE AQUEOUS SOLUTIONS OF MELAMINE-FORMALDEHYDE RESINS.

Country Status (8)

Country Link
US (1) US4454277A (en)
EP (1) EP0054755B1 (en)
AT (1) ATE20242T1 (en)
CA (1) CA1191979A (en)
DE (2) DE3048448A1 (en)
ES (1) ES8300820A1 (en)
YU (1) YU41802B (en)
ZA (1) ZA818442B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4605478A (en) * 1984-07-03 1986-08-12 Ppg Industries, Inc. Cationic electrodepositable compositions containing formaldehyde scavenger
US4560717A (en) * 1984-07-03 1985-12-24 Ppg Industries, Inc. Cationic electrodepositable compositions containing formaldehyde scavenger
US4806579A (en) * 1986-01-30 1989-02-21 The British Petroleum Co. P.L.C. Polymer composites
DE3929052A1 (en) * 1989-09-01 1991-03-07 Basf Ag METHOD FOR PRODUCING SPHERICAL, HARD MONO- OR OLIGODISPERSE PARTICLES MELAMINE RESIN
CN110894272B (en) * 2019-11-04 2022-09-13 圣象实业（江苏）有限公司 Synthesis process of melamine resin for long-storage-period impregnation
CN112341968A (en) * 2020-11-20 2021-02-09 江苏健坤木业有限公司 Adhesive for routing plate and preparation method thereof

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA526114A (en) * 1956-06-12 D. Pollard John Stabilized high solids melamine formaldehyde resin solutions and process for preparing the same
GB691053A (en) * 1949-01-25 1953-05-06 American Cyanamid Co Improvements in or relating to the stabilization against rapid gelation of acidic, aqueous, colloidal solutions of partially polymerized unalkylated and alkylated melamine-formaldehyde condensation products
US2640041A (en) * 1950-03-09 1953-05-26 Du Pont Process for preparation of melamine-formaldehyde reaction products
US2697086A (en) * 1952-03-18 1954-12-14 American Cyanamid Co Modified melamine-formaldehyde resin and process of preparing the same
CH342753A (en) * 1955-09-07 1959-11-30 Ciba Geigy Process for the preparation of a stable solution of a curable condensation product from melamine, thiourea and formaldehyde
CH362228A (en) * 1957-11-01 1962-05-31 Sueddeutsche Kalkstickstoff Process for the production of melamine-formaldehyde resins
GB936620A (en) * 1959-05-19 1963-09-11 Montedison Spa Process for the production of a stable solution of melamine formaldehyde condensation products
DE1570240C3 (en) * 1965-02-17 1982-05-27 Basf Ag, 6700 Ludwigshafen Process for the production of impregnating resins
DE2455420A1 (en) * 1974-11-22 1976-05-26 Lentia Gmbh Formaldehyde-urea-melamine condensates - by initially condensing formaldehyde and urea, adding melamine, and condensing under alkaline conditions

Also Published As

Publication number Publication date
US4454277A (en) 1984-06-12
EP0054755B1 (en) 1986-06-04
ES508193A0 (en) 1982-11-01
ZA818442B (en) 1982-10-27
DE3174782D1 (en) 1986-07-10
YU41802B (en) 1987-12-31
EP0054755A1 (en) 1982-06-30
DE3048448A1 (en) 1982-07-22
YU303381A (en) 1983-09-30
ES8300820A1 (en) 1982-11-01
CA1191979A (en) 1985-08-13

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Legal Events

Date Code Title Description
RVE Rejection due to an opposition filed with the epo